Pen



FIG. 1 is a lower left side perspective view of a pen showing my newdesign;

FIG. 2 is an upper right side perspective view thereof;

FIG. 3 is a front elevational thereof;

FIG. 4 is a left side elevation view thereof, the opposite side being amirror image thereof;

FIG. 5 is a rear elevational view thereof;

FIG. 6 is a lower left side perspective view of a detail thereof; and,

FIG. 7 is an upper right side perspective view of a detail thereof.

The ornamental design for a pen, as shown and described.